New A1 unit- PETG- generic 0.4nozzle. settings on default. Engineering plate.
object positioned with the 2 ‘gutters’ parallel to the movement of the table/plate.
problem(s):
Since ironing is terrible from the beginning, I stopped using it (may to be solved at a later date).
Since then I split the object and use the flat surface to glue both parts and accept the fisihed top layers as they are.
However, the bottom-part of the split has a small ‘gutter’ on 3 sides (2 long ones on the left and right side and 2 short ones in front).
Consequently from the split these gutters are to be printed upside down. Which make them hanging down some 4mm free over the plate - so supports are needed. all 4 support settings result in the same problem. the pics show the result from the tree support hybrid.
the small square in the middle shows the big distances between the lines of the first layer. howcome?
the ‘gutter’ on the left side is not perfect but stil attached. the one on the right shows the unmelted lines and the top part is simply seperated.
It looks like the first layer on top of the supports do not melt together and are seprated too far from each other to form a strong layer. What is it that I have to do to correct this?
As I understand things, the first layer on top of supports is a “bridge” layer. The strands on a bridge layer seem to be deliberately printed without touching each other, perhaps to help with the reliability of the bridging.
I have noticed that sometimes the bridge layer is laid in the same direction as the top support layer, which can cause problems. Turning the printed object 90 degrees can make a big difference, but that won’t help in your case.
You might be able to improve on the automatic supports by modelling a support yourself, with a tiny gap between the support and the finished part?
Hi,
unfortunately I do not fully understand the various layernames, iow what is meant with a particular layer e.g. top and bottom SHELL layers, do they influence the first layer on top of the supports??
I tried the Pattern angle in another object but found no difference.
Right now I changed my design and cut out the gutters and print them seperately. a test turned out to be very acceptable now that there are no supports required.
I have increased the gap between support and first layer to .2 (at least I hope the setting does what I think it is supposed to do).
I use the tree supports in hybrid. for horizontal holes this worked fine so far.
It takes quite some test time to find out if the chaged setting does the thing. I’ll keep trying. thanks for response.
attached is the set up printing at this moment. it will hopefully solve the problem.in this case but I csnt do this with all the ibjects unfortunately.
